Near Red Feather Lakes northwest of Fort Collins, campers were evacuated after hundreds of trees were knocked down. The trees blocked roads into the campground as the Memorial Day holiday weekend got underway.

There were no reports of injuries.

Fans watching the Colorado Rockies play the San Francisco Giants at Coors Field were told to seek safety in a lower concourse as tornado sirens wailed. The tornado warning soon expired.

Several incoming flights to Denver International Airport were delayed to let the storm pass.

Afternoon storms have also resulted in flooding along the First and Second Creek in Commerce City.

Located in the northern part of the city, standing and moving water from these drainage corridors is impacting Tower Road and 96th Avenue.

Stormwater runoff from the Rocky Mountain Arsenal National Wildlife Refuge is also impacting local roadways.

In the historic part of the city, Fairfax Park, which also acts as a detention pond, is approximately 5 feet below its banks on the east end and continues to rise.

City officials said the storm water system in the area is working as designed and two supplemental pumps are operational to help drain water from the park.

Sandbags are being deployed to the neighborhoods in an effort to protect homes on the north side of the park.

Should the water come within 2 feet of the bank, the Commerce City Police Department said it will implement voluntary evacuations. Mandatory evacuations will be in effect if the water comes within 1-foot.

Officials said road closures are in effect for:

96th Avenue, closed from Eagle Creek to Potomac Road

The intersection of Brighton Road and York Street is closed. There is 1 foot of water underneath the bridge.

Emergency responders are also monitoring Tower Road, from 81st to 96th Avenue as well as E. 96th Avenue, from Buckley Road to Tower Road.

These roads may potentially close this evening depending on flood conditions.

Officials said motorists should not attempt to travel across flooded road. If you don't need to drive, consider staying home. It only takes a few inches of swiftly flowing water to carry vehicles away.

For residents living near Fairfax Park in Commerce City, the higher than usual water levels are concerning.

"That park, I call it a lake right now. But we watch it real close," resident Jennie Vanschoiack told 7NEWS. "We flooded last year -- the house next door flooded. There's a few others down the road that flooded."

Crews will be near the park all evening long, trying to direct the rain and runoff.

"They've got the trucks out there now. Pumping the water. As long as they're there, I think everything will be OK," said Vanschoiack.

The rushing water also caused problems in Denver.

7NEWS spotted at least two cars stalled on the street at the intersection of 38th Avenue and Monaco Parkway.

This is the third round of severe weather in the Denver metro area in as many days.

A total of eight tornadoes touched down during Wednesday's spate of severe weather. In addition to the tornadoes, the severe thunderstorms produced large, golf-ball sized hail, damaging winds and pockets of heavy rain.

Follow live updates from 7NEWS crews and viewers who spot the severe weather passing through Colorado today:

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